Neve Campbell and Mamie Gummer join WGN America’s original drama Manhattan next week, and we've got an early peek.

In the episode "The Threshold," viewers are introduced to recurring characters Kitty Oppenheimer (Campbell) and Women's Army Corps recruit Nora (Gummer). The hour offers a flashback look at the days before Pearl Harbor, including the early stories of Liza (Olivia Williams) and Frank (John Benjamin Hickey).